DoublePi

SixTwentyEight & Change Social Networking iPhoneiPadiPod touch

DoublePi is a free Social Networking app for iPhone and iPad by SixTwentyEight & Change. Rated 5.0/5 from 1 ratings. Requires iOS 13.0.

Rating: 5.0; 1 ratings
Price: Free; on the App Store
Size: 82 MB; Age 4+
Updated: Mar 11; 2026 · v4.6

Download on theApp Store See alternatives

Screenshots

About DoublePi

2π is the true constant of a circle and the inspiration for creating the DoublePi community where our core mission is to help build a more circular society. DoublePi creates an easy and secure space where users can connect and share free, used/unused goods. Users showcase eco-friendly DYI projects and engage in contests based on those projects. (2PI)Feed features ideas about living the earth-friendly DoublePi lifestyle.

What’s new

Version 4.6 · Updated March 11, 2026

Maintenance performed throughout the app.

App privacy

The developer, SixTwentyEight & Change, reported these privacy practices to Apple.

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

Location: Precise Location
Contact Info: Email Address, Name
Diagnostics: Crash Data

Used for: Product Personalization, App Functionality, Other Purposes

App details

DoublePi is a free Social Networking app for iPhone, iPad and iPod touch, developed by SixTwentyEight & Change. It is rated 5.0 out of 5 from 1 ratings on the App Store, requires iOS 13.0 or later, is 82 MB to download and is available in 6 languages. It was first released on March 24, 2018 and last updated on March 11, 2026.

Category: Social Networking
Rating: 5.0 / 5 (1 rating)
Price: Free
Version: 4.6
Size: 82 MB
Requires: iOS 13.0 or later
Compatibility: iPhone, iPad, iPod touch
Languages: English, German, Japanese, Polish, Chinese, Spanish
Age rating: 4+
Released: March 24, 2018
Last updated: March 11, 2026
Developer: SixTwentyEight & Change

View on the App Store

Listing score

Our ASO checklist, run on this App Store listing.

Grade C

Number of ratings (1): More ratings make the average more convincing.
App name length (8 / 30): There’s room for a keyword after your brand, e.g. “Brand: What it does”.
iPhone screenshots (5 / 10): You can add up to 10.

See all 7 issues →

Build an app like DoublePi

Get a ready prompt for Claude Code, Cursor or Lovable: its features and business model, and what its users complain about, for an original app of your own.

Make the prompt →

Is this your app?

Give it a free website

Landing page, privacy policy and app-ads.txt, generated from your store listing.

Create it free

Alternatives to DoublePi

Looking for apps like DoublePi? Here are 6 similar apps on the App Store. The highest rated is PayMeKaty - share expenses (5.0/5), and all 6 are free to download.

DoublePi vs. alternatives
App	Rating	Price	Last updated	Compare
DoublePi	5.0 / 5 (1 rating)	Free	March 11, 2026
LoveBank: Birthday Reminder	4.8 / 5 (78)	Free	Feb 3, 2026	Compare
PayMeKaty - share expenses	5.0 / 5 (1)	Free	Apr 18, 2026	Compare
Jaaspire	5.0 / 5 (3)	Free	Oct 23, 2026	Compare
Faith - Christian singles	3.2 / 5 (13)	Free	Oct 29, 2026	Compare
Dimo - Voice Chat Room	4.4 / 5 (21)	Free	Sep 3, 2026	Compare
Meet9ja	4.7 / 5 (6)	Free	Oct 26, 2026	Compare

Compare DoublePi with the top alternatives: ratings, updates, ASO score and keyword gaps →